Calender roll



Dec. ,1 1930. 1,785,265

- QALENDA ROLL Filed Dec. 21, 1928 g INVENyTOR.

A TTORNEY,

Patented Dec. 16, 193% UNITED STATES PATENT OFFICE ARCHIIBALD LADE, DI NOBTAJIPON', I.ABSACEUSETTS, SSIGN'OR TO 3. 1?. BEBKINS & SON, IN'C., 01' HOLYOKE, KASSACHU'BETTS, A COBI'ORA'QION 01 HASSACK'U'SETTS CALEN'DER ROLL Aj p lication fl1ed December 21, 1928. Serial No. 387,851.

This inventi0n relates to improvements in calender rolls or what are commonly known as finishing rolls.

Rolls of the type to which the invention relates consist of aroll body formed by a stack of sheets or laminations which are pressed together under considerable pressure end locked in their pressed together relation between suitable end plates or headrs fixed 19 on a shaft. The body of theroll thus formed 4 by the sheets or laminations is t1'1rned or machined to provide the cylindrical roll shape havin.g the desired fimshing surface. 3 The laminations or sheets emgloyed are J.lr' usually of aper, cotton or the li e depending upon t e use to which the roll is to be put and upon the finish it is desired t o obtain. In,use the rolls are place'd in a calender stack adjhcent heated metal rolls for the fin- 21 ishing operation, thefabric or paper being finished by passing between the b1te of the lminated rolls and the metal rolls. By being disposed adjacent the metal roll beat is transmitted to and absorbed by the laminated roll body which heatnjuriously afi'ects the laminations thereof. That is the Inaterial is burned as it is called so that the body deteriorates rapidly, making it necessary to renew the rolls frequently. I ::a The material selected for the laminations of the roll body is that which wllgive the best calendering resultS without' speoial regard tothe beat resistin qualities thereof so that as a consequence t is burning or overt'i heating brings about"such a disintegration of the material as to injure the rolls. surface and render the roll u seless after a short time. According to. the -princiml object of this inventiorn, I provide a rol body which not "1f2 only has t'hedesired resiliency and finishing su'rfacefor the :best calendering effect but at the same time hasincorporated therein sueh' h'aatresistihg elements' as will .reta rd 4 or obviate the njurious effects of the beat .5 referred whereb V V longer riod o I usfulness than thepxesent -dayrol- This invention is capable of brad ap lication, but will be described in c miect1on C) with the accompanying drawings inwhich thev roll Will have a much- The figure is a; side elevational view, partly in section, of a; roll embodying the features of the invention.

Referring to the drawin in detail the invention will now be descn bed.

S represents a shaft or mandrel for a roll R which carries a pluralty or stack of laminations or sbeets which are pressed together end he1d upon the shaft in ther pressed together relation between headers or flanges S suitably secured to the shaft, the outer surfaee being turned after the assembling of the parts to provide the desired surface for the finishing operation. According to the y usual practice the roll described s located adjacent a metal roll in a stack which roll is indicated by M. According to the nov'el features of the invention, I employ a plurality of what may be called non-heatin resistixi laminations L and a lurality o beat res1sting laminations H d1spersed at intervals throughout the stackof laminations.

For instance for the laminations L, I use relatively thin shets of sort which in themselves woul provide a roll body of the desired characteristics, that is, a substantially hard body which is sufficiently resilient for the purpose and which may be machined to have the desired finishing surface. But as this material is naturally nonheat resisting it is subject to deterioration by the heating action during the calendering operation which aspreviously stated is objectionable. 7

For the beat resisting laminations Hoc may saper of some cording to the invention, I may use a mineral aper so-called. such as relatvelythin es- Iii) stos sheeting, which when dispersed throughout the stack of laminations L tends to provide a lamnated body which has beat res1sting qualities. Tht is to say the beat }I"esi s ting .e1emnts' tend to render the roll body hat-resisting so that thealements L may functidn to .Provde a body having the desired finished characteristics which is. 'protected against beat deteriorating-eflects by the beat resisting:elements, V

- It may be desired to alternate the lamina.- tions L axid H or to employ one of the laminations H for severals of "che others or vice versa. In fact the arrangement of the laminations may be varied at will while the selecton of the material for the laminations H will depend more or less on the material employed for the laminations L. It is desired accordirl to the invention to provide laminations of sufficient beat resisting qualities as wil1 overcome the tendency of the body as a whole to beat up and bo thereby injured. In this way the roll bod may have the required characteristics for t e finishin operation and at the same time be pro-' tecte against the injury caused by beat.

It will be understood .that in the broad aspect the elements L Will be substantially non-beat resisting as distinguished from the beat nesisting elements H and that I make use of the former for providing a body mostsuitable for the calenderingfunction while without interferin with this uncton I provide the beat resusting elements to protect the roll structure.

By the selection of such material as wll igrovido a roll body best adapted for' the nishing funct ions and by selecting such heat resisting material as will protect the body against the deteriorating beat eflfects it is possible to provide a roll whch will have a much longer life than those of the present day which are constructed with this calendering. characteristic -as the important consderation.

Having described the invention in the form at present preferred what I desire to secure by Letters Patent is:

1. A pair of calender rolls for finishing paper comprising in combination, a metallic roll havng a relutively ri id body and a nonyieldable surface, a roll aving a relatively non-rigid beat resisting body and a yeldable surface, the latter roll including a metallic sha,ft and paper and asbestos laminations intermingled to form a body wbich are held together in pressed rolation by flanges at opposite ends of said shaft.

2. A roll for a paper finishin machine comptising in combination,- a rigi supporting shaft, alternate sections of paper and of asbestos on said shaft which comprise circulardisclike laminations of paper and of asbestos, the said sections forming a relatively non-rigid heat-ressting body havin a relatively y1eldable peripherial surface an being held in pressed to ether relation by flmges fixed to said sha t adjacent its opposite ends.

In testimony whereof I aifix my signature.

ARCHIBALD LADE. 

